Is there a cipher that well suited for preschool-aged children to work out on pencil and paper, to learn concepts of block chains?
It must have the following requirements:
- Able to be easily verified
a. For example, Joe submitted red, but Suzy submitted blue. Everyone knows Suzy is right...somehow. (Color-specific results are not required but used to illustrate that the cipher need not be number-based, although that is fine too)
- Able to be easily ciphered with pencil and paper, or drawings, or in a child's head
- Able to use a previous result (minus the genesis of course), to create a 'blockchain' of sorts
The cipher may be low-complexity. It does not matter if it is easily broken.
Most ciphers are geared towards being easy to verify, but difficult to decipher. This situation is a bit different in that it does not have to be difficult to decipher. Out of the box ideas are quite welcome.